Heat-preserving apparatus



(No Model.)

A. A. FRBY. HEAT PRESERVING APPARATUS.

No. 441,835. PatentedDeo. 2, 1890.

UNITED p STATES PATENT OFFICE.

AUGUST ADOLF FREY, OF PRATTEI JN, SW'ITZERLAND, ASSIGF OR TO ARNOLD HOLINGER, OF CHICAGO, ILLINOIS.

HEAT-PRESERVING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 441,835, dated December 2, 1890.

Application filed July 26, 1890. Serial No. 360,108. (No model.) Patented in Switzerland February 16, 1889. No.486.

To all whom it may concern.-

Be it known that 1, AUGUST ADOLF FREY, a citizen of Switzerland, residing atPratteln, in the county of Baselland, Switzerland, have invented certain new and useful Improvements in Heat-Preserving Apparatus, (the same having been patented in Switzerland on the 16th day of February, 1889, No. 486,) of which the following is a specification, reference being had therein to the accompanying drawings.

This my invention has forits object to provide an apparatus in which partly-cooked victua'ls can be preserved in their heated state for from three to twelve hours, whereby the cooking is completed without further fire, and whereby these victuals are kept in a healthful palatable condition for many hours, and to so construct such an apparatus that it can be conveniently transported during excur sions, picnics, &c.; and with these objects in view my invention consists of the novel devices and combinations of devices hereinafter described and specifically claimed.

In the accompanying drawings, Figure 1 represents a perspective view of the apparatus as closed ready for transportation; Fig. 2, a similar view with the lid opened; Fig. 3, a longitudinal vertical section of the apparatus on line y y of Fig. 4; Fig. 4:, a sectional plan of the same on linear a, Fig. 3; and Fig. 5 is an elevation of the victual-holding vessel detached.

Corresponding letters of reference in the several figures of the drawings designate like parts.

A denotes the chest, which may be rectangular or round, and is provided with a lid 13. The interior of this chestA may have divided off by a partition a a side space C, adapted to receive plates, spoons, knives, and forks. In the center of the remaining space of the chest is fixed asheet-metal chamber D, preferably made cylindrical, closed onrbott-om, and secured with its bottom flanges upon wooden strips or posts (Z,while the top of such chamber D is surrounded by a wooden cap-piece e, secured by wood-screws upon wooden side strips f, spiked against the inside of the walls of the chest A and against partition (t to be rigid. This sheet-metal. chamber l) is enveloped by a layer E of a compound that is a non-conductor of heat, and is composed of eight parts of resin or colophony, one part of beeswax, one part of glue, and twoparts of soot, the resin or colophony, wax, and glue being melted over a slow fire and well stirred to be thoroughly combined, and then during continuous agitation the soot is intermixed, and after that while the compound is still in a molten condition it is spread over avflannel cover E, closely fitted and stretched over the chamber D. This being done previously to inserting and securing this chamber D upon the strips or posts d, the intervening spaces between the bottom and walls of chest A- and partition at around chamber D are filled with calves hair or other material M that is a nonconduetor of heat before the cappiece eis secured. The chamberD is the receptacle for the vietual-holders or culinary vessels F and F, that by a bayonet-joint are locked one on top of the other, the vessel F thus at the same time forming the cover for vessel F, while vessel F is closed by a cover 9, also provided with a bayonet-joint for locking the same and with ahandle it, by which to lift the vessels]? F thus connected out of chamber D and by which to insert the same.

After the vessels F F have been inserted into chamberD a stopper I is providedfor filling the space in chamber D above such vessels F F, which stopper is made of woolen,

flannel, or other Woven fabric 1, filled wit-h calves hair, feathers, or any other elastic materialthat is a non-conductor of heat. The shallow space in the underside of lid 13 is also bolstered with calves hair or feathers b in a manner to produce a slight pressure upon stopper I with closing, the lid.

A suitable locking devicej is provided for securing the lid upon the chest, and a handle It is fixed to the top of the lid by which to carry the chest.

For preparing soup, vegetables, or meat it will be sufficient to cook the same over a fire only from eight to ten minutes and then shut it in the vessel F F and insert these vessels into chamber D, apply the stopper I, and close the chest A, when, on account of the complete insulation of chamber 1), the boiling heat of the part1 y-cooked victuals will be retained therein for hours, whereby the cooking process will be slowly completed,and whereby the victuals, whatever they may be, will acquire a more pleasing taste than when cooked until completion over a fire. Besides that, these victuals thus made ready in such chest can be kept therein in a heated state for twelve hours Without the necessity of rewarming the same.

3y the use of this apparatus, as will be readily seen, considerable time and fuel will be saved in preparing meals.

hat I claim is 1. In a heat retaining or preserving apparatus,the combination, With a metallic vessel having a fibrous covering and a non-conducting composition spread or coated over the fibrous covering, of an inclosing-case of Wood or analogous material, and having a lining of fibrous non conducting material, such as calves hair, entirely inclosing the metallic vessel, as set forth.

2. The arrangement Within achest of a metallic chamber for holding a culinary vessel to contain Victuals in their boiling state, such chamber being insulated by a surrounding layer of a composition prepared of resin or colophony, beeswax, glue, and soot, and be ing further insulated by a non-conductor of heat, such as calves hair, and being closed on top by a stopper of similar material, substantially as set forth.

3. A heat-preserving apparatus consisting of the Wooden closure A, having a top lid, a separate open chamber 0 at one side, a metallic vessel D, having supports 01 and located in the center of the main chamber of the box, a textile or fibrous covering E'rfor the metallic vessel, a composition coating for the fibrous covering, a packing all around, above, and beneath the metallic vessel, consisting of calves hair or analogous material, and a stopper for the said vessel, consisting of a textile sack filled with calves hair or similar material, as set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

AUGUST ADOLF FREY Witnesses:

GEoRo FRIEDM. GRos, ADOLF Rnrrsono MULLER; 

